From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f169.google.com (mail-wi0-f169.google.com [209.85.212.169]) by kanga.kvack.org (Postfix) with ESMTP id 2F37982F6F for ; Tue, 6 Oct 2015 05:25:01 -0400 (EDT) Received: by wiclk2 with SMTP id lk2so157531125wic.0 for ; Tue, 06 Oct 2015 02:25:00 -0700 (PDT) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id l20si36838397wjw.125.2015.10.06.02.24.52 for (version=TLS1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 06 Oct 2015 02:24:52 -0700 (PDT) From: Jan Kara Subject: [PATCH 4/7] fsl_hypervisor: Convert ioctl_memcpy() to use get_user_pages_fast() Date: Tue, 6 Oct 2015 11:24:27 +0200 Message-Id: <1444123470-4932-5-git-send-email-jack@suse.com> In-Reply-To: <1444123470-4932-1-git-send-email-jack@suse.com> References: <1444123470-4932-1-git-send-email-jack@suse.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Jan Kara , Timur Tabi From: Jan Kara CC: Timur Tabi Signed-off-by: Jan Kara --- drivers/virt/fsl_hypervisor.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c index 32c8fc5f7a5c..c65e5e60d7fd 100644 --- a/drivers/virt/fsl_hypervisor.c +++ b/drivers/virt/fsl_hypervisor.c @@ -243,13 +243,8 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) sg_list = PTR_ALIGN(sg_list_unaligned, sizeof(struct fh_sg_list)); /* Get the physical addresses of the source buffer */ - down_read(¤t->mm->mmap_sem); - num_pinned = get_user_pages(current, current->mm, - param.local_vaddr - lb_offset, num_pages, - (param.source == -1) ? READ : WRITE, - 0, pages, NULL); - up_read(¤t->mm->mmap_sem); - + num_pinned = get_user_pages_fast(param.local_vaddr - lb_offset, + num_pages, (param.source == -1) ? READ : WRITE, pages); if (num_pinned != num_pages) { /* get_user_pages() failed */ pr_debug("fsl-hv: could not lock source buffer\n"); -- 2.1.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org